Shureka Washburn has scores of 78, 83, 65 , and 78 on her algebra tests. a. Use an inequality to find the scores she must make on the final exam to pass the course with an average of 76 or higher, given the final exam counts as two tests.

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.